Example of retracing on figure from page f2r, rightmost flower. The petals of the flower were partly retraced, perhaps because they were partly washed out when the light pinkish transparent paint was applied to the corolla. (A) Original traces. (B,D) Retracing changed the shape of the petal from blunt triangle to sharp lance. (C) Original outline visible under retraced one. (E,G) Retracer added petals sticking out from side of original corolla, whose outline was (H). (F) Original petal almost completely washed out.